Does it make the same noise in all gears? A lot of times if its the transmission the noise will be absent in 4th gear because that one is straight-through and puts very little load on most of the parts in the tranny.

As others have said, driving in front wheel drive is a good way to eliminate the rear drivetrain.


'97 4Runner, '06 F350, '86 4Runner, '05 WR450
http://home.4x4wire.com/erik